Sphygmomanometer



FIG. 1 is a perspective view from the rear upper _side of a sphygmomanometer according to my design, showing my new design;

FIG. 2 is a perspective view from the rear lower side;

FIG. 3 is a perspective view from the front lower side; and

FIG. 4 is a perspective view from the front upper side. 

The ornamental design for a sphygmomanometer, or similar article, substantially as shown and described. 